Filter.



P. W. M ANGELSDORFP.

FILTER.

APPLICATION FILED SEPT. a, 1909.

1,01 1,130, Patented Dec.5, 1911.

3 SHEET8-SHEET 1.

P. W. MANGELSDORPP.

Patented Dec. 5, 1911.

3 SHEETS-SHEET 2.

P. W. MANGELSDORFF.

FILTER.

APPLICATION FILED SEPT. 3, 1909.

Patented Dec. 5, 1911.

3 SHEETS-SHEET 3.

rai /3,5 /a ll C ccccccccccccccc AP 11 co, WASHXN FREDERICK W.MANGELSDOBFF, OF MILWAUKEE, WISCONSIN.

FILTER.

1,o11,1so.

Specification of Letters Patent.

Patented Dec. 5, 1911.

Application filed September 3, 1909. Serial No. 516,019.

To all whom it may concern:

Be it known that I, FREDERICK lV. MAN- GELSDORFF, a citizen of theUnited States, residing at Milwaukee,'in the county of Milwaukee andState of WVisconsin, have invented a new and useful Filter, of which thef0llowing is a specification.

' My invention relates to improvements in filters.

The object of my invention is to provide a structure composed of aseries of alternating grate and filter frames, so arranged as to forminlet and outlet mains and filter beds, interposed between the portsleading from, and to, the inlet and outlet mains respectively, saidgrates and frames being so arranged that no outer casing is required andthe several frames may be taken apart and cleansed without disturbingthe filtering material which remains permanently secured in position inthe respective filtering frames.

In the following description, reference is had to the accompanyingdrawings, in which,

Figure 1 is a side elevation of my improved filter. Fig. 2 is a detailsectional View through two of the frames drawn partly to a plane cuttingthrough an inlet main and partly to a plane cutting through an outletmain, the passage of liquid from the inlet to the outlet being indicatedby arrows. Fig. 3 is a side view of one of the grate frames. Fig. 41 isa side view of one of the filtering 7 frames with the filtering materialpartially removed. Fig. 5 is a central sectional view of the same online y-y of Fig. 4. Fig. 6 is a sectional view drawn through three ofthe grate frames and two interposing filter frames on a plane cuttingthrough one of the inlet passages and extending parallel to the gratebars through the opposing outlet pas sages.

Like parts are identified by the same reference characters throughoutthe several views.

The body'of the filter is made up of a series of grate frames A andfiltering frames -B arranged in alternation and clamped between a headpiece C and foot piece D by a clamping screw E which has threadedbearing in a frame member F, connected with the head piece C by rods G.The liquid is admitted through a chamber H, pipe I, and ducts J and K,and exhausts through the ducts L and M and pipe 0. A chamber P,

having walls composed partially of glass, allows the filtered liquid tobe inspected. The chamber H also has walls formed partially of glass,thus allowing an inspection of the unfiltered liquid.

Each of the grate frames comprises an annular outerring 1 having aninteriorly projecting web 2 of less thickness, the margins of which areconnected by a series of parallel grate bars 3 of substantially the samethickness as the ring 1. At opposite sides of the grate frame, the ring1 is provided with inwardly extending projections 4c of the samethickness as the ring and provided with openings 6 and 7, one of theopenings serving for the unfiltered liquid, and the other openingserving for the filtered liquid as hereinafter explained. In each of thegrate frames, the walls of the openings 6 are formed to provide ports10', affording communication between such openings over the surface ofthe web 2 to the spaces between the grate bars.

The filter frames comprise rings 11 provided with inwardly projectingwebs 12 of less thickness, and openings 16 and 17 corresponding inrelative position to the openings 6 and 7 in the grate frames, the walls15 of said openings being, however, of greater thickness than the webs,but of less thickness than the rings 11. The outer margins of the walls15 and the inner margins of the rings 11 are undercut as illustrated at-13 in Fig. 6, and thereby retain a sheet 20 of filtering material, whichis pressed into the open central space formed by the frame and coversthe web and the walls 15 as shown in said figure, thus forming afiltering member which is of the same thickness as its outer marginthroughout.

The grate frames and filter frames are preferably circular in form andare assembled by arranging them in alternation, and also by reversingeach intermediate grate frame, whereby the rear face of one correspondswith the front face of the next, etc., and the opening 6 of one is thusalined with an opening 16 of a filter frame and an opening 7 of the nextsucceeding grate frame, whereby the openings 6 and 7 of successive grateframes, taken with the openings 16 of the respectively interposed filterframes, constitute a continuous inlet passage extending from one end ofthe structure to the other. The openings 7 and 6, respectively, ofsuccessive grate frames, register with lead to the outlet passage.

successive openings 17 in the filter frames and constitute a completeoutlet passage extending from one end of the structure to the otherparallel to the inlet passage. One

passage of each kind is located on each side 7 of the structure. Theducts J and K connect with the inlet passages and the ducts L and Mconnect with the outlet passages. The filtering material in the frames Bforms a packing upon the walls 15 between such Walls and the Walls ofthe projections 4, since it is compressed in the spaces between themembers 4 and the walls 15. The path of the fluid is therefore fromducts J and K through the openings 6 of each alternate grate frame, theopenings 16 of each filter frame and the openings 7 of each intermediategrate frame, and from these passages through the ports 10 to the spacesbetween the grate bars of the alternate grate frames and through thefiltering material 20 to the spaces between the bars of the intermediateframes from which spaces it is delivered through the ports 10 of theseframes into the exhaust or outlet passages.

It will be understood that the intermediate grate frames are preferablyexactly like the alternate grate frames except as to position. They arereversed in position as above explained, so that their ports 10 willEach of the filtering frames therefore receives a portion of the liquid,and filters it independently of the others, and by increasing the numberof frames the capacity of the filter will be increased to any extentwithin the capacity of the openings 6 and 7, 16 and 17. The rings 1 ofthe grate frames are provided with flexible annular packing strips 25which bear upon the rings 11 when the frames are assembled, thusenabling me to dispense with an inclosing casing except as furnished bythe rings.

In the above described structure there are no holes in the several framemembers which can become clogged, the passages being formed along thesurface of the web 2 between the grate bars and extending from each ofthe openings 6 to the inner margin of the web 2. The wall of the passageopposing the web 2 is provided in each case by that part of thefiltering material which covers the webs 12 of the filter frames. Whenit is desired to clean the device, it is, therefore, merely necessary toseparate the grate frames from the filter frames, whereupon all of thesepassages will be merely open sided channels or recesseswhich may bereadily inspected and cleansed.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is,

1. In a device of the described class, the combination with a set offiltering frames, each having an inwardly projecting web, and a marginof greater thickness than the web, and each such frame having aperturedweb portions of an intermediate thickness, a sheet of filtering materialinclosed by said frames and covering the web portions thereof, exceptwhere apertured, and a series of grate frames interposed between thefilter frames, and provided with grate bars supporting said sheets offiltering material, said grate frames being provided with aperturesadapted to register with the apertures in the filter frames, and havingopen sided chan nels between the grate bars leading to certain of saidapertures.

2. In a device of the described class, the combination with an openframe, having an inwardly projecting web of less thickness than theouter margin of the frame, and a sheet of filtering material filling theframe opening, substantially to said thickened outer margin, and havingsaid web embedded in the margin of said sheet, together with a set ofgrate frames embracing the filtering frame, with the grate bars bearingupon and supporting the sides of the filtering sheet, said grate framesand filter frames being provided with connecting ducts near theirmargins extending through the marginal portions of the sheetsoffiltering material, for the admission and discharge of fluid ;-each ofthe grate frames being provided with open sided channels leading fromthe spaces between the grate bars to one set of ducts, and saidfiltering frame'having its web thickened adjacent to the ducts andcovered with filtering materialcompressed by the grate frames andforming a packing surrounding said ducts, substantially as described.

In testimony whereof I aflix my signature in the presence of twowitnesses.

FREDERICK W. MANGELSDORFR.

Witnesses:

D. R. FRYMARK, JOHN TOUsoH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

